Paper-making machine and process.



No. 785,704. I PATENTED MAR. 28, 1905.

' R. BIN NS.

PAPER MAKING MACHINE AND PROCESS.

APPLIOATION FILED JUNE 13. 1904.

llllllllllllllllllllllllllll Q vi/tmeooaz ETMmaM toz Ro-er/B in 72a UNITED STATES Patented March 28, 1905.

ROBERT BINNS, OF SOUTH VINDHAM, CONNECTICUT.

PAPER-MAKING MACHINE AND PROCESS.

SPECIFICATION forming part of Letters Patent No. 785,704, dated March 28, 1905.

I Application filed June 18, 1904. Serial No. 213,058.

.description.

My invention relates to paper-making apparatus and process.

Among the main objects of my invention is to provide certain new and useful improvements in paper-making apparatus of the cylinder type, whereby said apparatus will produee a paper of superior quality and very similar to the paper produced on the so-ealled Fou rdrinier machine.

Incidentally the apparatus is simple, inexpensive, durable, and eii'ective.

In the accompanying drawings, Figure 1 is a plan view of my invention with certain parts removed. Fig. 2 is a side elevation.

1 is the frame of the machine, which frame may be of any suitable form.

2 is a cylinder having a screened periphery and upon which the paper web is deposited. The cylinder 2 is rotatably mounted in the frame 1, preferably in an open boX or bearing 3, thus permitting the cylinder to be readily removed.

at is a couch-roll.

5 is a blanket.

6 6 are bearing-brackets for the couch-r0114. (See Fig. 2.)

7 represents weights by means of which the couch-roll 4 may be caused to hold the blanket 5 against the surface of the cylinder 2 with the desired pressure.

8 is a tank the function of which is to hold the pulp. The tank is so arranged or placed relatively to the screened periphery of the cylinder 2 that the pulp will flow toward said screened surface. The material portion thereof will be deposited upon said screen, the pulpsuspending medium flowing through. preferable form of my invention this tank is arranged substantially as shown in the drawings. In the same it will be seen that the tank 8 has three closed sides, while the side adjacent to the cylinder is fitted thereto in such a In the i manner that the screen itself forms the fourth wall of the tank. Suitable packings may of course be provided between the edges of the tank 8 and the cylinder 2.

9 is an inlet-pipe by which pulp in a state of suspension may be fed into the tank 2.

The cylinder is moved in the direction of the arrow. Hence immediately after the pulp web is deposited upon the screen it is removed from the pulp-suspending liquid and taken up by the blanket 5 after the usual manner.

Paper produced by the ordinary cylindermachine has a well-defined grain, and as a result is strong in one direction and relatively weak in another direction. Paper produced by the Fourdrinier machine lacks this definite grain and is equally strong in all directions. It will thus be seen that although my machine is of the cylinder type paper produced thereon possesses the characteristics of the paper produced by the Fourdrinier machine. This is due to the fact that as soon as the web is deposited on the screen it is removed from the water in tank 8, and hence the fibers are not washed into the definite alinement common to paper produced by the ordinary cylinder-machine. On the contrary, they are arranged indiscrimin-ately and impart to the finished product substantially the same strength in all directions, a feature of recognized value in the art. The water that flows through the screenin conducting the pulp to the surface thereof is free to run out through the ends or the opposite side of the cylinder and may, if desired,becaughtinasuitabledrain. (Notnecessary to show.) The usual washing-jets may be provided as in the usual cylinder-machine. If desired, an outlet-pipe 9 may be arranged opposite the pipe 9, whereby a current may be given to the pulp within the tank 8. This current is in a direction transversely of the direction of movement of the surface of the cylinder 2, and hence assuming there should be the slightest wash this may be negatived by the transverse current. I have found from practical use that this outlet-pipe 9 is not essential, although in some cases it may be desirable. The inlet-pipe is of course not essential, but is provided in order that a constant level may be maintained in the tank 8. The

thickness of the pulp maybe modified at will by varying the depth of pulp in tank 8 or modifying the speed of the cylinder. These features of control would be obvious to a practical paper-maker.

The substantial difference between this apparatus and the method of manufacturing paper over that employed in the usual papermaking machine is that the pulp web is removed from water or liquid which suspends the pulp as soon as it is deposited upon the screen, whereas in the ordinary paper-making machine the deposit of the web occurs only during that interval that the screened surface of the cylinder is exposed to the current of water suspending the pulp. This current is produced by providing a lower water-level within the cylinder than outside the same. .In such a case when the cylinder has turned and the web has reached the level of the water inside the cylinder the depositing of pulp ceases, and from that time on the web traverses through water a distance substantially greater than one-half the circumference of the cylinder. It is during this interval that the aforesaid washing of the fiber occurs which imparts to the final product the aforesaid grain. It is this washing step that 1 have eliminated and by reason of which mainly I am able to produce and obtain the substantial improvement aforesaid.

In the drawings I have only shown one cylinder. Obviously these may be multiplied as desired.

The waste water which passes through the screen into the cylinder is free to flow out of the cylinder at any point. In practice should materials of high specific gravity be used having a tendency to settle in the water it will be seen that by my improvement substantially all of such material will settle upon the moving screen of the cylinder and will immediately become a part of the pulp web. In the ordinary paper-making apparatus a very large proportion of such material settles directly to the bottom of the tank without depositing upon the cylinder.

In the ordinary cylinder-machine the water used in washing the cylinders becomes, to a greater or less degree, a part of the contents of the pulp contained in the tank and tends to dilate the same and otherwise act in a detrimental manner-for example, by red ucing the coloring-matter and by washing any impurities retained by the cylinder back into the pulp in suspension. By my improvement the cylinder may be washed by the ordinary jets at a point entirely away from the tank.

In the ordinary cylinder-machine it is most difiicult to deposit pulp upon a cylinder if the pulp is of a slimy nature. This, however, is easily accomplished by my improvement.

What I claim is 1. In a paper-making apparatus, a cylinder havinga porous screened periphery, a blanket, a pulp-tank arranged below the top of the cylinder, one side of the tank only opening against the screened portion of said cylinder, the said parts being so arranged that when the web is deposited on the cylinder it is lifted thereby from the pulp-suspending medium in the tank and conveyed without alining the fibers directly to said blanket.

2. In a paper-making apparatus a cylinder having a porous screened periphery, a blanket, a pulp-tank arranged below the top and ad jacent to the screened surface of said cylinder, said screened surface forming one side of said tank, said parts being so arranged that the pulp is deposited by percolation in one continuous layer or web on that portion of the screen forminga wall of the tank, and is lifted thereby from the pulp-suspending medium in said tank and conveyed without alining the fibers directly to said blanket.

3. The method of manufacturing paper which includes the uninterrupted deposit by percolation of a continuous web upon the rising surface of a rotating cylindrical screen, said deposit being made below the level of a liquid-pulp-suspending medium, then lifting the web thus formed immediately from the liquid pulp to a substantially horizontal plane above said pulp and conveying it, without alining the fibers, directly to a web-removing blanket.

Signed at WVillimantic, in the State of Connecticut, this 16th day of June, 1904:.

ROBERT BINNS.

Vitnesses:

GEORGE MnLoNY, GEORGE J. KInBY. 

